<template>
  <div :class="className" :style="{height:height,width:width}"/>
</template>

<script>
  import echarts from 'echarts'

  require('echarts/theme/macarons') // echarts theme
  import { debounce } from '@/utils'

  const animationDuration = 6000

  export default {
    props: {
      statistics: {
        type: Object,
        'default': {}
      },
      className: {
        type: String,
        default: 'chart'
      },
      width: {
        type: String,
        default: '100%'
      },
      height: {
        type: String,
        default: '230px'
      }
    },
    data() {
      return {
        chart: null
      }
    },
    watch: {
      statistics: function(newVal) {
        if (Object.keys(newVal).length !== 0) {
          this.initChart();
        }
      }
    },
    mounted() {
      this.__resizeHandler = debounce(() => {
        if (this.chart) {
          this.chart.resize()
        }
      }, 100);
      window.addEventListener('resize', this.__resizeHandler)
    },
    beforeDestroy() {
      if (!this.chart) {
        return
      }
      window.removeEventListener('resize', this.__resizeHandler)
      this.chart.dispose()
      this.chart = null
    },
    methods: {
      initChart() {
        this.chart = echarts.init(this.$el, 'macarons')
        this.chart.setOption({
          tooltip: {
            trigger: 'axis',
            axisPointer: { // 坐标轴指示器，坐标轴触发有效
              type: 'shadow' // 默认为直线，可选为：'line' | 'shadow'
            }
          },
          grid: {
            top: 10,
            left: '2%',
            right: '2%',
            bottom: '3%',
            containLabel: true
          },
          xAxis: [{
            type: 'category',
            data: ['A NET 硬盘使用率', 'A NET 内存使用率', 'A NET CPU使用率', 'B NET 硬盘使用率', 'B NET 内存使用率', 'B NET CPU使用率'],
            axisTick: {
              alignWithLabel: true
            }
          }],
          yAxis: [{
            type: 'value',
            axisTick: {
              show: false
            },
            max: 100,
            axisLabel: {
              formatter: '{value}%'
            }
          }],
          series: [{
            name: '百分比',
            type: 'bar',
            stack: 'vistors',
            barWidth: '40%',
            data: [
              this.statistics.adiskUsage,
              this.statistics.amemoryUsage,
              this.statistics.acpuUsage,
              this.statistics.bdiskUsage,
              this.statistics.bmemoryUsage,
              this.statistics.bcpuUsage
            ],
            animationDuration
          }]
        })
      }
    }
  }
</script>
